Parse /etc/lsb-release only once on ChromeOS

chrome/browser/chromeos/system_logs/lsb_release_log_source.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/chromeos/system_logs/lsb_release_log_source.h"
 
-#include <string>
-
-#include "base/bind.h"
-#include "base/bind_helpers.h"
-#include "base/file_util.h"
-#include "base/files/file_path.h"
-#include "base/logging.h"
-#include "base/strings/string_split.h"
-#include "base/strings/string_util.h"
-#include "content/public/browser/browser_thread.h"
-
-using content::BrowserThread;
-
-const char kInvalidLogEntry[] = "<invalid characters in log entry>";
-const char kEmptyLogEntry[] = "<no value>";
-
-namespace {
-
-typedef std::pair<std::string, std::string> KeyValuePair;
-
-}  // namespace
+#include "base/memory/scoped_ptr.h"
+#include "base/sys_info.h"
 
 namespace chromeos {
 
 void LsbReleaseLogSource::Fetch(const SysLogsSourceCallback& callback) {
   DCHECK(!callback.is_null());
-
-  SystemLogsResponse* response = new SystemLogsResponse;
-  BrowserThread::PostBlockingPoolTaskAndReply(
-      FROM_HERE,
-      base::Bind(&LsbReleaseLogSource::ReadLSBRelease, response),
-      base::Bind(callback,
-                 base::Owned(response)));
-}
-
-void LsbReleaseLogSource::ReadLSBRelease(SystemLogsResponse* response) {
-  DCHECK(response);
-
-  const base::FilePath lsb_release_file("/etc/lsb-release");
-  std::string lsb_data;
-  bool read_success = base::ReadFileToString(lsb_release_file, &lsb_data);
-  // if we were using an internal temp file, the user does not need the
-  // logs to stay past the ReadFile call - delete the file
-  if (!read_success) {
-    LOG(ERROR) << "Can't access /etc/lsb-release file.";
-    return;
+  scoped_ptr<SystemLogsResponse> response(new SystemLogsResponse);
+  const base::SysInfo::LsbReleaseMap& lsb_map =
+      base::SysInfo::GetLsbReleaseMap();
+  for (base::SysInfo::LsbReleaseMap::const_iterator iter = lsb_map.begin();
+       iter != lsb_map.end(); ++iter) {
+    (*response)[iter->first] = iter->second;
   }
-  ParseLSBRelease(lsb_data, response);
-}
-
-void LsbReleaseLogSource::ParseLSBRelease(const std::string& lsb_data,
-                                          SystemLogsResponse* response) {
-  std::vector<KeyValuePair> pairs;
-  base::SplitStringIntoKeyValuePairs(lsb_data, '=', '\n', &pairs);
-  for (size_t i = 0; i  < pairs.size(); ++i) {
-    std::string key, value;
-    TrimWhitespaceASCII(pairs[i].first, TRIM_ALL, &key);
-    TrimWhitespaceASCII(pairs[i].second, TRIM_ALL, &value);
-
-    if (key.empty())
-      continue;
-    if (!IsStringUTF8(value) || !IsStringUTF8(key)) {
-      LOG(WARNING) << "Invalid characters in system log entry: " << key;
-      (*response)[key] = kInvalidLogEntry;
-      continue;
-    }
-
-    if (value.empty())
-      (*response)[key] = kEmptyLogEntry;
-    else
-      (*response)[key] = value;
-  }
+  callback.Run(response.get());
 }
 
 }  // namespace chromeos
-